One of China’s biggest wind turbine makers has been quietly and slowly building out a business in the U.S. and developing digital energy software with a group of U.S. tech firms. Envision Energy , based in Shanghai, announced an alliance on Friday that includes Microsoft, Accenture and ARM, and is focused on uniting “a fragmented energy world,” as CEO Lei Zhang described it, around digital networking, sensors and algorithms. “We are providing the digital foundation for the energy world. We want to create a new version of an energy company,” said Zhang in an interview in downtown San Francisco. Additional members are expected to join the "Energy IOT and Smart City Technology Alliance" at a later date. Envision, founded in 2007, is the world’s tenth largest wind turbine maker, according to a recent Bloomberg New Energy Finance report , and the second-largest one in China. In...